The stone has size of 28x17x4 mm (1.1x0.671x0.16")The ring is solid sterling silverAdjustable ring sizeActual ring size:Inside diameter: 18,1mm (0.71 ")Size Spain: 17Size Europe: 57Size USA and Canada: 8Size UK and Australia: P 1/2Size China: 17- You can enlarge the ring is till size: Inside diameter: 20,4 mm (0.8")Size Spain: 24Size Europe: 64Size USA and Canada: 10.5Size UK and Australia: VSize China: 23It can also be reduced to a smaller sizeThe ring is entirely handmadeThe piece you will receive is that one from the photo and it is ready to be sent.It is a unique piece handmade entirely by me.If you are searching for an original gift for her this ring can be a choice